91641131 has 8 divisors (see below), whose sum is σ = 98923680. Its totient is φ = 84633472.

The previous prime is 91641103. The next prime is 91641149. The reversal of 91641131 is 13114619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91641131 - 2²⁶ = 24532267 is a prime.

It is a super-2 number, since 2×91641131² = 16796193781918322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91641131.

It is not an unprimeable number, because it can be changed into a prime (91641331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68030 + ... + 69363.

It is an arithmetic number, because the mean of its divisors is an integer number (12365460).

Almost surely, 2^91641131 is an apocalyptic number.

91641131 is a deficient number, since it is larger than the sum of its proper divisors (7282549).

91641131 is a wasteful number, since it uses less digits than its factorization.

91641131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137445.

The product of its digits is 648, while the sum is 26.

The square root of 91641131 is about 9572.9374279789. The cubic root of 91641131 is about 450.8479993437.

The spelling of 91641131 in words is "ninety-one million, six hundred forty-one thousand, one hundred thirty-one".